Question
Consider the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. If
Consider the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. If 3.65 mol of magnesium and 3.65 mol of hydrochloric acid are reacted, how many moles of hydrogen gas are produced?
a. 7.30 mol
b. 1.83 mol
c. 3.65 mol
d. 5.65 mol
e. None of these
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The balanced chemical equation for the reaction is:
Mg + 2 HCl -> MgCl2 + H2
According to the stoichiometry of the reaction, 1 mole of magnesium reacts with 2 moles of hydrochloric acid to produce 1 mole of hydrogen gas.
Therefore, if 3.65 mol of magnesium and 3.65 mol of hydrochloric acid are reacted, the maximum number of moles of hydrogen gas that can be produced is 3.65 mol x (1 mol H2 / 2 mol HCl) = 1.825 mol H2.
The answer is therefore b. 1.83 mol.
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